Benzinga's Volume Movers

Weight Watchers International, Inc. WTW shares climbed 86.01 percent to $12.63. The volume of Weight Watchers shares traded was 6559 percent higher than normal. Oprah Winfrey will buy a 10 percent stake in Weight Watchers International, and will also join the company's board. PMC-Sierra Inc PMCS shares rose 13.78 percent to $11.65. The volume of PMC-Sierra shares traded was 905 percent higher than normal. Microsemi Corporation MSCC offered to acquire PMC-Sierra in a $2.4 billion deal. Zafgen Inc ZFGN surged 11.05 percent to $11.51. The volume of Zafgen shares traded was 548 percent higher than normal. Zafgen shares dipped 50.71 percent on Friday. Suntrust maintained a Buy rating on Zafgen and lowered the price target to $25 from $47. Diebold Inc DBD shares moved up 6.97 percent to $35.89. The volume of Diebold traded was 292 percent higher than normal. Diebold is in talks to acquire Wincor Nixdorf for €52.50 per share in cash and stock.